AutoCodes – Generic – P1BF9

P1BF9 Code - Hybrid/Electric Vehicle Battery 93 Circuit Performance

Quick Answer

The Hybrid/Electric Vehicle battery pack contains 288 cells. Common causes include Faulty Hybrid/Electric Vehicle Battery Pack, Faulty Hybrid/Electric Vehicle Battery Interface Control Module. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1BF9 indicates Hybrid/Electric Vehicle Battery 93 Circuit Performance.
Common causes: Common causes include Faulty Hybrid/Electric Vehicle Battery Pack, Faulty Hybrid/Electric Vehicle Battery Interface Control Module.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 772

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1BF9 Description

The Hybrid/Electric Vehicle battery pack contains 288 cells. Groups of three cells are welded together in parallel. There are a total of 96 cell groups in the hybrid/EV battery pack assembly. These cell groups are electrically connected in-series. Each individual cell group is rated at 3.7 V, for a nominal system voltage of 355 V direct current. The battery cells are also grouped together into three sections. The first 90 cells/30 cell groups make up battery section one. This section is adjacent to the cowl and contains batteries 67 through to 96. Battery section two is located behind section one. It is made up of 72 cells/24 cell groups and contains batteries 43 through to 66. The transverse battery section is section number three, it is made up of the remaining 126 cells/42 cell groups and contains batteries 1 through to 42. The three battery sections are individually serviceable components.
The battery energy control module monitors the voltage of the 96 battery cell groups through the four hybrid/EV battery interface control modules. Voltage sense circuits are attached to each individual cell group, and these sense circuits terminate at a connector located on the top surface of the battery section. A serviceable auxiliary battery wiring harness joins this connector to a hybrid/EV battery interface control module, also located on the top surface of the battery section. The hybrid/EV battery interface control module encodes the voltage reading and transmits it to the battery energy control module through the battery control harness. There is one hybrid/EV battery interface control module located on battery sections one and two, and two hybrid/EV battery interface control modules associated with battery section three. The hybrid/EV battery interface control module, battery energy control module wiring harness, auxiliary battery wiring harness, and battery energy control module are all considered serviceable components.
The battery energy control module will determine when a fault condition is present. Diagnostics and system status are communicated from the battery energy control module to hybrid/EV powertrain control module 2 through serial data. The hybrid/EV powertrain control module 2 is the host controller for diagnostic trouble code information.

OBDII Code P1BF9 - Hybrid/Electric Vehicle Battery 93 Circuit Performance - AutoCodes.com — P1BF9 Code - Hybrid/Electric Vehicle Battery 93 Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1BF9?

Faulty Hybrid/Electric Vehicle Battery Pack
Faulty Hybrid/Electric Vehicle Battery Interface Control Module

How to Fix the DTC P1BF9?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1BF9 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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Need Help with the Code?

Get the P1BF9 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1BF9 Buick — Hybrid/Electric Vehicle Battery 93 Circuit Performance
P1BF9 Cadillac — Hybrid/Electric Vehicle Battery 93 Circuit Performance
P1BF9 Chevrolet — Hybrid/Electric Vehicle Battery 93 Circuit Performance
P1BF9 GMC — Hybrid/Electric Vehicle Battery 93 Circuit Performance
P1BF9 Saturn — Hybrid/Electric Vehicle Battery 93 Circuit Performance

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1BF9 Code

1. What are common symptoms of OBDII code P1BF9 related to Hybrid/Electric Vehicle Battery 93 Circuit Performance?

- Common symptoms include reduced electric vehicle range, poor battery performance, and potential issues with hybrid system operation.

2. What are the possible causes of OBDII code P1BF9 Hybrid/Electric Vehicle Battery 93 Circuit Performance?

- Causes may include faulty battery cells, damaged battery wiring, issues with battery management system, or problems with the hybrid system components.

3. How can I diagnose the OBDII code P1BF9 related to Hybrid/Electric Vehicle Battery 93 Circuit Performance?

- Diagnosis typically involves using a scan tool to read the code, checking the battery system for any visible damage, and performing electrical tests on the battery and related components.

4. Can I continue driving my hybrid or electric vehicle with OBDII code P1BF9 present?

- It is not recommended to continue driving the vehicle with this code as it could lead to further damage to the battery system and potentially affect the vehicle's performance.

5. What repairs are typically needed to fix OBDII code P1BF9 Hybrid/Electric Vehicle Battery 93 Circuit Performance?

- Repairs may involve replacing damaged battery cells, repairing faulty wiring, resetting the battery management system, or addressing issues with the hybrid system components.

6. How much does it cost to repair OBDII code P1BF9 related to Hybrid/Electric Vehicle Battery 93 Circuit Performance?

- Repair costs can vary depending on the extent of the damage and the specific components that need to be replaced or repaired. It is recommended to consult a professional for an accurate estimate.

7. Can I reset the OBDII code P1BF9 without fixing the underlying issue?

- While you can clear the code using a scan tool, it is important to address the root cause of the problem to prevent further issues with the battery system or hybrid operation.

8. Are there any maintenance tips to prevent OBDII code P1BF9 in Hybrid/Electric Vehicle Battery 93 Circuit Performance?

- Regularly inspecting the battery system, following manufacturer maintenance schedules, and avoiding extreme temperature conditions can help prevent issues that may trigger this code.

9. Can a DIY enthusiast repair OBDII code P1BF9 related to Hybrid/Electric Vehicle Battery 93 Circuit Performance?

- Due to the complexity of hybrid and electric vehicle systems, it is recommended to seek professional help for diagnosing and repairing issues related to this OBDII code.

10. How long does it take to repair OBDII code P1BF9 Hybrid/Electric Vehicle Battery 93 Circuit Performance?

- The repair time can vary depending on the extent of the issue, availability of parts, and the expertise of the technician. It is advisable to consult with a professional for a more accurate time frame.